Vat dye.



IEEX HUG-EL, G1? LEVERKUSEN, NIQliR CULQGNE, GERMANY, ASSIG-NOR TOFARBEN- FABRIKEN VOl tIiI. FRIEDR. BAYER 80 (30., OF ELBEBJFELD,GERMANY, & CORPORA- TEQN 43F GERMANY.

VAT

coarse,

1i Drawing.

I stuff which is obtained by condensing one molecule of2-amino-1.3-dibromoanthraquinone with E-methylaminod.3-dihroinoanthraouinone. A. inononiethylindanthrene is thus obtained inaccordance with the following equation:

4- 2H Br Specification of Letters Patent.

Application tiled November 16, 1910. serial Ho. 592,656.

Patented June 13, 1911.

more-fully the following example is given, the parts being by we1ghtz-l5parts of 2 amino 1.3 dibroinoanthraquinone, 15.6 parts of 2monomethy'lamino 1.3 dibromoanthraquinone, 12 parts of anh drous sodiumacetate, 6 parts of Oa(OHl 0.5 parts of anhydrous copper chlorid areheated to boiling with 150 parts ofnaphthalene until the formation ofthe dye is completed. The dye is filtered off, washed with naphtha,alcohol and hot hydrochloric acid and hot water. The dye thus obtainedpossesses the remarkable property of dyeing full and deep shades evenfrom a cold vat, while the known indanthrenes are only capable of dyeingfrom a Warm vat. This property renders it possible to use this dye inconjunction with other vatdyes e. g. With the benzoylaminoanthraquinonesand shades.

10 kilos of a 10 per cent. pasteof dibromomethylindanthrene (seeexample) are mixed with 40 liters of water of 40 0., 4 liters causticsoda lye (30 B.) and 30 liters of hydrosulfite (17 B5.) are added. Themixture is well stirred until the color is dissolved, which requiresabout 20 minutes. This solution is passed through a sieve into thdye-bath which consists of 1000 liters of cold water, to which iliter ofcaustic soda lye B.), liter hydrosulfite solution (17 B.) and kilos ofcommon salt have been added. The bath is well stirred and kilos ofcotton yarn after having been well wetted out are entered. The cotton isworked for to 1 hour in the cold. After dyeing the goods are squeezedout, well exenables the dyer to produce a large variety of fast posed,rinsed, acidulated with a solution The herein described new dyestufibeing" a hydroazin derivative of the anthracene series, having probablythe formula:

5 m /k LCD/U which dyestufi crystallizes in dark blue needles,difiicultly soluble with a blue color in nitrobenzene, vsoluble inconcentrated S111 15 furic acid with a brown color; dyeing the fiberfrom a hydrosulfite Vat in blue shades, substantially as described Intestimony whereef I have hereunto set my hand in the presence of twosubscribing 20 Witnesses.

MAX KUGEL. [11. 5.]

Witnesses ALFRED HENKEL, WALTER VONNEG T.

